html body{
    background: #f0f0f0;
    min-height:100vh ;
}


.bg{
    width: 100vw;
    height: 177.7vw;
    object-fit: fill;
    position: fixed;
    left: 0;
    top: 0;
    z-index: -1;
}


.hdsm{
    position: fixed;
    right: 0;
    top: 24vh;
    width: 10vw;
    height:13.43vw ;
}
.detail1{
    position: fixed;
    width: 80vw;
    height: 96.47vw;
    left: 10vw;
    top: 42vw;
}
audio{
    z-index: 101;
    margin-top: 20vw;
}
.jiayan{
    position: fixed;
    width: 80vw;
    height: 96.49vw;
    left: 10vw;
    top: 42vw;
}
.videomodal .back,
.sharemodal .back,
.fstmodal .back
{
   position: absolute;
   width: 40vw;
   height: 12.575vw; 
    bottom: 30px;
}
 .back.heartbeat{
      transition: transform 0.2s ease-in-out;
    /* 平滑过渡效果*/
    animation: heartbeat 2s infinite;
}


.btns{
    width: 100vw;
     height: 12.575vw; 
    position: fixed;
    bottom: 5vw;
    display: flex;
    width: 100vw;
    justify-content: space-around;
}

.btns img{
    width: 40vw;
    height: 12.575vw; 
}

.videobg{
    z-index: 1;
    position: relative;
    display: flex;
    justify-content: center;
    width: 80vw;
    height: 96.47vw;
    left: 10vw;
    top: 42vw;
     background: url('http://techcherry.cn/guoyuanh5/src/video_bg.png');
    background-size: 100% 100%;
}

.qrcode{
    width: 26vw;
    height: 26vw;
    position: absolute;
    bottom: 25px;

}

.sharebg{
    z-index: 1;
    position: fixed;
    display: flex;
    justify-content: center;
    left: 7.5vw;
    top: 40vw;
    width: 85vw;
    height: 102.836vw;
     background: url('http://techcherry.cn/guoyuanh5/src/share_bg2.png');
    background-size: 100% 100%;
}

.videomodal{
    z-index: 1;
    position: relative;
    text-align: center;
    display: flex;
    justify-content: center;
    left: 7.5vw;
    top: 45vw;
    width: 85vw;
    height: 78.598vw;
     background: url('http://techcherry.cn/guoyuanh5/src/jqtc.png');
    background-size: 100% 100%;
}

.fstmodal{
    z-index: 1;
    position: relative;
    text-align: center;
    display: flex;
    justify-content: center;
    left: 7.5vw;
    top: 45vw;
    width: 85vw;
    height: 78.598vw;
     background: url('http://techcherry.cn/guoyuanh5/src/first_modalkuang.png');
    background-size: 100% 100%;
}


.sharemodal{
    z-index: 1;
    position: relative;
    text-align: center;
    display: flex;
    justify-content: center;
    left: 7.5vw;
    top: 45vw;
    width: 85vw;
    height: 78.598vw;
     background: url('http://techcherry.cn/guoyuanh5/src/video_modalkuang.png');
    background-size: 100% 100%; 
}

.jiayanmodal{
    z-index: 100;
    position: relative;
    text-align: center;
    display: flex;
    justify-content: center;
    left: 7.5vw;
    top: 45vw;
    width: 85vw;
    height: 78.598vw;
     background: url('http://techcherry.cn/guoyuanh5/src/three_modalkuang.png');
    background-size: 100% 100%; 
}

.clock{
    position:absolute;
    top: -14vw;
    right: -10px;
    z-index: 100;
}

.clock p{
    padding: 5px;
    width: 30px;
    border-radius: 50%;
    border: 1px solid #ff8b02;
    color: #fff;
    font-size: 16px;
}

.close{
    position: fixed;
    width: 12vw;
    height: 12vw;
    bottom: 20vw;
}

.close.three{
    z-index: 1001;
    left: 44vw;
}

.sharebgbg{
    position: fixed;
    left: 0;
    top: 0;
    width: 100vw;
    height: 100vh;
    z-index: 1000;
}


video{
    z-index: 10;
    width: 70vw;
    height: 39.67vw;
    margin-top: 30px;
}

.postmodal{
    width: 100vw;
    height: 100vh;
    z-index: 10000;
    position: fixed;
    display: flex;
    align-items: center;
    justify-content: center;
}

.postmodal .mask{
   background-color: rgba(0, 0, 0, .6);
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100vw;
    height: 100vh;
    position: fixed;
}

.postmodal .poster_jiantou{
    z-index: 10001;
    position: fixed;
    right: 20px;
    top: 20px;
    width: 8vw;
}
.postmodal .poster{
    width: 70vw;
    position: fixed;
    left: 15vw;
    top: 24vw;
    z-index: 10001;
}
.postmodal .poster_word{
    color: #fff;
    position: fixed;
    bottom: 36px;
    z-index: 10001;
    font-size: 12px;

}


